Hello:

I even have an 0 Byte initrd-image for kernel 2.6, but it works for me.
Interesting ...

I think your error message has something to do with your scsi-disks (sda).
Could be ...

May be your scsi-controller is not detected by your kernel 2.6 and therefore there is no access to your hard-disk.
That would be strange ...
This Adaptec AHA-29139 Ultra works with the previous kernel and boots perfectly well with the CD.

Are you able to boot from cd with the kernel 2.6?
Yes, it works quite well.

Then you can try to hdinstall with kernel 2.6 booted from cdrom.
This is what I do everytime when I do a hdinstall. The other option is to build your own kernel out of the sources.
If I recall correctly, I think that's how I installed.
I wonder if there's a small quirk in the layout of the Knoppix CD or the install script. (Any ideas Fabian F.?)

Thanks for the input.

Best regards,

CIV